'\" t
.TH "SD_BUS_CALL_METHOD" "3" "" "systemd 249" "sd_bus_call_method"
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.SH "NAME"
sd_bus_call_method, sd_bus_call_methodv, sd_bus_call_method_async, sd_bus_call_method_asyncv \- Initialize a bus message object and invoke the corresponding D\-Bus method call
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-bus\&.h>
.fi
.ft
.HP \w'typedef\ int\ (*sd_bus_message_handler_t)('u
.BI "typedef int (*sd_bus_message_handler_t)(sd_bus_message\ *" "m" ", void\ *" "userdata" ", sd_bus_error\ *" "ret_error" ");"
.HP \w'int\ sd_bus_call_method('u
.BI "int sd_bus_call_method(sd_bus\ *" "bus" ", const\ char\ *" "destination" ", const\ char\ *" "path" ", const\ char\ *" "interface" ", const\ char\ *" "member" ", sd_bus_error\ *" "ret_error" ", sd_bus_message\ **" "reply" ", const\ char\ *" "types" ", \&.\&.\&.);"
.HP \w'int\ sd_bus_call_methodv('u
.BI "int sd_bus_call_methodv(sd_bus\ *" "bus" ", const\ char\ *" "destination" ", const\ char\ *" "path" ", const\ char\ *" "interface" ", const\ char\ *" "member" ", sd_bus_error\ *" "ret_error" ", sd_bus_message\ **" "reply" ", const\ char\ *" "types" ", va_list\ " "ap" ");"
.HP \w'int\ sd_bus_call_method_async('u
.BI "int sd_bus_call_method_async(sd_bus\ *" "bus" ", sd_bus_slot\ **" "slot" ", const\ char\ *" "destination" ", const\ char\ *" "path" ", const\ char\ *" "interface" ", const\ char\ *" "member" ", sd_bus_message_handler_t\ " "callback" ", void\ *" "userdata" ", const\ char\ *" "types" ", \&.\&.\&.);"
.HP \w'int\ sd_bus_call_method_asyncv('u
.BI "int sd_bus_call_method_asyncv(sd_bus\ *" "bus" ", sd_bus_slot\ **" "slot" ", const\ char\ *" "destination" ", const\ char\ *" "path" ", const\ char\ *" "interface" ", const\ char\ *" "member" ", sd_bus_message_handler_t\ " "callback" ", void\ *" "userdata" ", const\ char\ *" "types" ", va_list\ " "ap" ");"
.SH "DESCRIPTION"
.PP
\fBsd_bus_call_method()\fR
is a convenience function for initializing a bus message object and calling the corresponding D\-Bus method\&. It combines the
\fBsd_bus_message_new_method_call\fR(3),
\fBsd_bus_message_append\fR(3)
and
\fBsd_bus_call\fR(3)
functions into a single function call\&.
.PP
\fBsd_bus_call_method_async()\fR
is a convenience function for initializing a bus message object and calling the corresponding D\-Bus method asynchronously\&. It combines the
\fBsd_bus_message_new_method_call\fR(3),
\fBsd_bus_message_append\fR(3)
and
\fBsd_bus_call_async\fR(3)
functions into a single function call\&.
.SH "RETURN VALUE"
.PP
On success, these functions return a non\-negative integer\&. On failure, they return a negative errno\-style error code\&.
.SS "Errors"
.PP
See the man pages of
\fBsd_bus_message_new_method_call\fR(3),
\fBsd_bus_message_append\fR(3),
\fBsd_bus_call\fR(3)
and
\fBsd_bus_call_async\fR(3)
for a list of possible errors\&.
.SH "NOTES"
.PP
These APIs are implemented as a shared library, which can be compiled and linked to with the
\fBlibsystemd\fR\ \&\fBpkg-config\fR(1)
file\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsd-bus\fR(3),
\fBsd_bus_message_new_method_call\fR(3),
\fBsd_bus_message_append\fR(3),
\fBsd_bus_call\fR(3),
\fBsd_bus_set_property\fR(3),
\fBsd_bus_emit_signal\fR(3)
